1366 - Incorrect integer value: '' for column `pella-ware`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 's9npsk2oh9bbuu9ncb8s2d75f2', '18.189.170.17', '1713255044', '1713255044', '/login.php?XTCsid=s9npsk2oh9bbuu9ncb8s2d75f2')

[XT SQL Error]